How much does it cost to fix boiler error code CFL70?

Typical repair cost for the boiler CFL70 fault is £150-300 including labour.

CFL70 High

Boiler Fault Code CFL70

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code CFL70 appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has stopped working because it is failing to sense that it is burning gas correctly, which means the system has shut itself down to keep your home safe. (As reported on Potterton Kingfisher MF RSL/CFL)

Pick your boiler brand for the CFL70 fix

Potterton CFL70 1 model

Source

Information for the CFL70 fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026